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mm/vmscan: convert reclaim_clean_pages_from_list() to folios 

Patch series "nvert much of vmscan to folios"

vmscan always operates on folios since it puts the pages on the LRU list. 
Switching all of these functions from pages to folios saves 1483 bytes of
text from removing all the baggage around calling compound_page() and
similar functions.


This patch (of 5):

This is a straightforward conversion which removes several hidden calls
to compound_head, saving 330 bytes of kernel text.

Link: https://lkml.kernel.org/r/20220617154248.700416-1-willy@infradead.org
Link: https://lkml.kernel.org/r/20220617154248.700416-2-willy@infradead.org
Signed-off-by: Matthew Wilcox (Oracle) <willy@infradead.org>
Reviewed-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
This commit is contained in:
Matthew Wilcox (Oracle) 2022-06-17 16:42:44 +01:00 committed by akpm
parent 64fe24a3e0
commit b8cecb9376
2 changed files with 17 additions and 11 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

6
include/linux/page-flags.h
View File

@ -670,6 +670,12 @@ static __always_inline bool PageAnon(struct page *page)
return folio_test_anon(page_folio(page));
}
static __always_inline bool __folio_test_movable(const struct folio *folio)
{
return ((unsigned long)folio->mapping & PAGE_MAPPING_FLAGS) ==
PAGE_MAPPING_MOVABLE;
}
static __always_inline int __PageMovable(struct page *page)
{
return ((unsigned long)page->mapping & PAGE_MAPPING_FLAGS) ==

22
mm/vmscan.c
View File

@ -2041,7 +2041,7 @@ keep:
}
unsigned int reclaim_clean_pages_from_list(struct zone *zone,
struct list_head *page_list)
struct list_head *folio_list)
{
struct scan_control sc = {
.gfp_mask = GFP_KERNEL,
@ -2049,16 +2049,16 @@ unsigned int reclaim_clean_pages_from_list(struct zone *zone,
};
struct reclaim_stat stat;
unsigned int nr_reclaimed;
struct page *page, *next;
LIST_HEAD(clean_pages);
struct folio *folio, *next;
LIST_HEAD(clean_folios);
unsigned int noreclaim_flag;
list_for_each_entry_safe(page, next, page_list, lru) {
if (!PageHuge(page) && page_is_file_lru(page) &&
!PageDirty(page) && !__PageMovable(page) &&
!PageUnevictable(page)) {
ClearPageActive(page);
list_move(&page->lru, &clean_pages);
list_for_each_entry_safe(folio, next, folio_list, lru) {
if (!folio_test_hugetlb(folio) && folio_is_file_lru(folio) &&
!folio_test_dirty(folio) && !__folio_test_movable(folio) &&
!folio_test_unevictable(folio)) {
folio_clear_active(folio);
list_move(&folio->lru, &clean_folios);
}
}
@ -2069,11 +2069,11 @@ unsigned int reclaim_clean_pages_from_list(struct zone *zone,
* change in the future.
*/
noreclaim_flag = memalloc_noreclaim_save();
nr_reclaimed = shrink_page_list(&clean_pages, zone->zone_pgdat, &sc,
nr_reclaimed = shrink_page_list(&clean_folios, zone->zone_pgdat, &sc,
&stat, true);
memalloc_noreclaim_restore(noreclaim_flag);
list_splice(&clean_pages, page_list);
list_splice(&clean_folios, folio_list);
mod_node_page_state(zone->zone_pgdat, NR_ISOLATED_FILE,
-(long)nr_reclaimed);
/*